Why Tibetan monks, Christian hermits, Sufi mystics, Egyptian initiates and shamans across the globe all independently discovered the same doorway in total Darkness, centuries before anyone had a word for endogenous DMT.
Hestia Retreat - Interview
Greg sat down with us again - this time with a neuroscience lover firing the questions - to talk about why monks, mystics and shamans across every continent and every century independently arrived at the same Dark doorway, and what that tells us about the brain.
It's the thing that humbles me most about this work. Tibetan Buddhists, Sufis, Christian hermits, Egyptian initiates, Haitian Vodou practitioners, Japanese Shinto, Celtic tribes, the Dagar shamans of Africa, the Lakota of North America, the Kogi of South America - none of them were comparing notes. And yet they all found their way to the same room, so to speak. Darkness is a technology that's been available to humans since before even the birth of fire. It doesn't need to be transmitted culturally, because it's already built into the nervous system. You just have to remove enough light input for long enough, and the same door opens. That's not coincidence, that's convergent discovery.
Tibetan Buddhists have used what they call tun - Dark retreat - for over a thousand years, and it's considered one of their most advanced practices. Monks and nuns will spend weeks, months, sometimes years in complete Darkness. In the Dzogchen tradition specifically, it's seen as essential for recognising rigpa - the natural, luminous awareness that's said to be our true nature underneath everything else. Without sight to distract it, the mind has nowhere left to hide. Practitioners describe direct encounters with what they call the clear light of awareness. There's a line from that tradition I keep coming back to: in Darkness, there is nothing to see but the seer itself.
It does. Christian hermits and mystics retreated to caves in the Egyptian wilderness - the Desert Fathers - and discovered that physical Darkness often preceded spiritual illumination. St John of the Cross wrote about this at length, and crucially he didn't frame the dark night as suffering for its own sake. He saw it as the necessary passage through Darkness that leads toward union with the Divine. Many Christian contemplatives used literal Darkness as a doorway into what they called unknowing - a state where the ordinary thinking mind quietens enough for something more direct to come through.
Yes - Sufi mystics speak of khalwa, a spiritual retreat undertaken in Darkness, as essential for polishing what they call the mirror of the heart. In complete Darkness, removed from all external phenomena, the seeker meets that paradoxical idea of a luminous black - a Darkness that somehow contains every colour and every possibility at once. It's poetic language, but it points at something real: that absence and presence aren't opposites in this work, they fold into each other.
That's the speculation, and I find it compelling. The Egyptians built their most sacred spaces - the inner chambers - in complete Darkness, and initiates underwent profound transformations there, emerging with knowledge they said came directly from the gods. What's interesting is that most pyramids around the world sit over natural caves, sometimes left completely untouched, and some researchers believe those caves were more sacred to the builders than the pyramids themselves. The initiate would go into the Darkness for extended periods, fasting, staying until something shifted - not unlike Buddha's vow under the tree. There's a real possibility those chambers weren't tombs at all, but consciousness laboratories.
Darkness removes the veil between worlds. That's how shamanic and indigenous cultures describe it, and it's a fitting description, because it allows access to realities that simply stay invisible under ordinary light. Vision quests often incorporate nights of complete Darkness, where seekers encounter spirit guides, receive visions about their life purpose, and feel that interconnected web of existence directly rather than conceptually. The Huichol people of Mexico conduct their most important rituals, including the peyote pilgrimage to Wirikuta, largely at night and in liminal Darkness - they believe sensory deprivation through Darkness enhances spiritual perception and awakens what they call sacred sight.
Traditional shamans describe using Darkness to journey to other worlds in order to heal themselves and others with the help of allies, to communicate with spirits and ancestors, to retrieve soul parts lost through trauma, and to uncover hidden influences and deeper patterns at play in a person's life. Strip away the cosmology and what you're left with is something modern psychology would recognise immediately - this is shadow work. Indigenous healing traditions understood that much of our suffering comes from parts of ourselves we can't see or won't accept. Darkness gives those parts somewhere safe to surface, so they can be integrated rather than running the show unconsciously.
It's deeply connected. Extended Darkness naturally enhances both the likelihood and the intensity of lucid dreams, because REM sleep - where lucid dreaming mainly happens - gets extended, and the brain spends more time in those slower wave states too. There's also a simple mechanical reason: when you wake in total Darkness, there's no light to trigger serotonin release, so you tend to drift straight back into sleep rather than fully waking - and that's exactly the window where most people lucid dream. Tibetan dream yoga and Hindu yoga nidra both treat Darkness as the optimal environment for developing conscious dreaming, and for the Tibetans this isn't just a curiosity - they believe learning to wake up inside a dream is what prepares you to wake up in the Bardos, the states between death and rebirth.
There's real history there. Salvador Dalí and Thomas Edison both deliberately worked with the hypnagogic state - that drowsy threshold just before sleep - to access surreal imagery, and Darkness is exactly where that threshold gets easiest to find and hold. Maya Angelou famously wrote many of her most powerful works before dawn. Darkness reduces analytical interference from the logical mind, it activates the right brain's pattern-recognition and more holistic processing, it lets unconscious material surface into conscious awareness, and it strips away visual self-consciousness. Put all of that together and you get a state that's unusually fertile for creative work.
Strikingly so. People who've had both experiences often describe them as nearly identical. Across cultures and centuries, both Darkness work and DMT trips produce remarkably consistent themes - encounters with luminous beings or entities, experiences of universal consciousness and cosmic unity, visions of geometric or fractal patterns, a kind of direct knowing that bypasses ordinary thought, and healing at the deepest levels of the psyche. The difference in Darkness is pacing. It tends to come on far more slowly and gently than smoking the molecule directly, typically beginning after several days of total Darkness and peaking somewhere around day ten or eleven. I think both are pointing at the same underlying territory of human consciousness, just reached by different doors.
I'd say hold it the way you'd hold any body of evidence that predates the instruments needed to measure it. What's changed isn't the human brain - it hasn't changed, and neither has our capacity for transcendence. What's changed is our relationship to Darkness itself. In a world that's artificially lit around the clock, we've forgotten that Darkness isn't the absence of something, it's the presence of everything we've lost touch with. These traditions arrived at that understanding independently, repeatedly, across the entire span of human history, long before anyone had a word for melatonin or pinoline. That kind of convergence, to me, is its own form of evidence - it invites us to step away from overstimulation and discover that understimulation might actually be where the deeper peace is found.
Darkness is a technology which has been available to humans since before even the birth of fire - and every wisdom tradition has, in its own way, rediscovered it.
Hestia Retreat offers darkness immersions from 1 to 10+ nights.
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